TROUBLESHOOTING SECTION IX Important Procedure When   locating   and   correcting   unit   power   or   auxiliary transmission troubles, a systematic procedure should be followed. Road  test  whenever  possible.    Mechanics  usually   get second or third hand reports of trouble experienced with the    unit.        These    reports    do    not    always    accurately describe  the  actual  conditions.    Sometimes  symptoms seem    to    indicate    trouble    in    the    transmission,    while actually the problem is with the axle, driveshaft, universal joints,  engine  or  clutch.    This  is  especially  true  of  noise complaints. Therefore, before removing the transmission   or   related   components   to   locate   trouble, road   test   to   check   the   possibility   of   trouble   in   other closely  associated  units.    Road  testing  is  most  effective when the mechanic himself drives the vehicle.  However, riding with the driver can be very informative. Check Functioning Prior to Disassembly If a remote control is used, a careful check of the remote and connecting linkage must be made.  The remote unit must  be   in   good   working   order   if   the   transmission   is expected to shift satisfactorily. Many times, the answer to the trouble is apparent when the   unit   is   inspected   prior   to   disassembly.      But   this evidence  is  often  lost  when  the  parts  are  separated.    If possible,  check  the  unit  prior  to  disassembly.    Bear  in mind that a careful inspection of the unit should be made as each disassembly step is performed. Inspect Thoroughly During Disassembly It is poor practice to disassemble a unit or the complete transmission  as  quickly  as  possible  without  examining the parts.  The mechanic may completely disassemble a unit  and  fail  to  find  the  cause  of  the  trouble,  unless  he examines the parts. After the transmission is disassembled,  check  the  lubricant  for  foreign  particles. This  is  a  source  of  trouble  often  overlooked  during  the disassembly. Repair or Replace Worn Parts Many times the parts or critical adjustments causing the trouble    are    not    replaced    or    corrected    because    the mechanic   only   inspects   and   replaces   parts   that   have failed    completely.        All    pieces    should    be    accurately examined because broken parts are often just the result- not  the  cause-of  the  problem.    All  parts  that  are  broken or  worn  and   no   longer   meet   specifications   should   be replaced. Also,  parts  that  are  worn  to  the  extent  that  they  do  not have  a  long  service  life  remaining  should  be  replaced. Replacing  these  parts  now  will  avoid  another  teardown on the unit in the near future.  Also at this time, make the recommended   changes   or   modifications   to   bring   the transmission  up  to  date  and  increase  the  service  life  of the unit. CAUTION: If the backup lights do not function, check the following: 1. Continuity of switch with ball fully depressed 2. Electrical plug connection 3. Wiring 24